The investment seeks daily investment results, before fees and expenses, that correspond to two times (2x) the daily performance of the Dow Jones U.S. Health CareSM Index. The fund invests in financial instruments that ProShare Advisors believes, in combination, should produce daily returns consistent with the fund's investment objective. The index measures the performance of certain companies in the healthcare industry of the U.S. equity market. Component companies include, among others, health care providers, biotechnology companies, medical supplies, advanced medical devices and pharmaceuticals. The fund is non-diversified.